document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=256326>Question 256326</A>: <I><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "10 questions test. you know the answer to 5 questions of true or false. You quess on the last 5. What is the probability that you will have at least eight correct answers.  Express your answer as a common fraction. Hint look at the word (least) and think about combinations nCr.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #188459 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=188459\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 10 questions test. you know the answer to 5 questions of true or false. You quess on the last 5. What is the probability that you will have at least eight correct answers. Express your answer as a common fraction. Hint look at the word (least) and think about combinations nCr. <BR>\n" );
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document.write( "You need at least 3 correct from the 5.<BR>\n" );
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document.write( "P(at least 3 of 5) =  1 - binomcdf(5,1/2,2)<BR>\n" );
document.write( "= 1 - 0.5<BR>\n" );
document.write( "= 0.5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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